SLOW workflows opening (30s) and activities cutting/copying (10s)

similar issue : Bug/Issue with Copy and pasting activity from one xaml to another - #17 by bluecompute
If some apps are launched, the copy behavior will be freezing.
In my case, the acroedit(http://www.acrosoft.pe.kr/acroedit/) is launched, the copy behavior is freezing about 30 seconds.